Derro Heritage
Derro heritage grants Small size, 30 feet speed, +2 Charisma, Dwarvish, and Calculating Insanity.
Your darakhul character was a derro before transforming into a darakhul. For you, the quieting of the otherworldly voices did not bring peace and tranquility. The impulses simply became more focused, and the desire to feast on flesh overwhelmed other urges. The darkness is still there; it just has a new, clearer form. Size. Derro stand between 3 and 4 feet tall with slender limbs and wide shoulders. Your size is Small. Speed. Your base walking speed is 30 feet. Ability Score Increase. Your Charisma score increases by 2. Language. You can speak, read, and write Dwarvish. Calculating Insanity. The insanity of your race was compressed into a cold, hard brilliance when you took on your darakhul form. These flashes of brilliance come to you at unexpected moments. You know the true strike cantrip. Charisma is your spellcasting ability for it. You can cast true strike as a bonus action a number of times equal to your Charisma modifier (a minimum of once). You regain any expended uses when you finish a long rest.
Source and licence
From Tome of Heroes.
Licence: Open Game Content (OGL 1.0a).